voiddo llm-cost vs llmpricecheck.com
Both help developers understand LLM API pricing. But one shows raw per-token rates — and one calculates your actual monthly bill. This page explains the difference and when each is the right tool.
voiddo llm-cost — use when
- You need to know your real monthly spend at a given usage volume
- You're comparing models for a specific app workload
- You want results sorted by cost for your use case
- You need a CSV export for a budget spreadsheet
- You want a no-account, browser-only calculation
- You're evaluating whether to switch from GPT-4o to Gemini Flash
llmpricecheck.com — use when
- You want a quick per-token rate reference
- You need context window sizes alongside pricing
- You want to see many providers at once in one table
- You need the latest price for a just-announced model
feature comparison
| feature | voiddo llm-cost | llmpricecheck.com |
|---|---|---|
| monthly cost projection | ✓ enter usage → see $ total | not available |
| daily prompt volume input | ✓ slider control | – |
| tokens per request input | ✓ separate input + output | – |
| real-time recalculation | ✓ instant on every input change | static table |
| sort by projected cost | ✓ cheapest-first ranking | – |
| CSV export | ✓ Pro ($9 one-time) | – |
| per-token price reference | ✓ shown per model | ✓ primary view |
| model count | 23 models | large, frequently updated |
| context window info | – | ✓ shown per model |
| GPT-4o included | ✓ | ✓ |
| Claude Sonnet 4 included | ✓ | ✓ |
| Gemini Flash included | ✓ | ✓ |
| DeepSeek V3 included | ✓ | ✓ |
| browser-only / no login | ✓ zero server calls | ✓ static site |
| offline support | ✓ works after page loads | requires connection |
| no ads | ✓ | ✓ |
| free to use | ✓ (CSV export is Pro) | ✓ |
frequently asked questions
Is voiddo llm-cost an alternative to llmpricecheck.com?
Yes. voiddo LLM API Cost Calculator (tools.voiddo.com/llm-cost/) is a free, browser-only tool that calculates your projected monthly API spend across 23 LLM models. Unlike a pricing table, you enter your actual usage — daily prompts, average input tokens, average output tokens — and the tool instantly projects your real monthly cost for GPT-4o, Claude Sonnet, Gemini Flash, DeepSeek, and 20+ more. It runs entirely in the browser with no account or server required.
What makes voiddo llm-cost different from a pricing table?
A pricing table shows per-token rates; you still have to multiply them yourself. voiddo llm-cost takes your actual usage inputs — prompts per day, tokens per request — and computes the monthly dollar amount for every supported model simultaneously. The result is a sortable ranked list showing which LLM is cheapest for your specific workload, not just in general. For a workload of 500 prompts/day at 1K tokens each, DeepSeek V3 at $0.27/MTok is roughly 40× cheaper than GPT-4o at $10/MTok — a difference of ~$150/month.
How do I estimate my actual monthly LLM API spend?
Open tools.voiddo.com/llm-cost/, set the three inputs: (1) prompts per day — how many API calls your app or workflow makes daily; (2) average input tokens — typical prompt length in tokens (a 300-word prompt ≈ 400 tokens); (3) average output tokens — typical response length (a 200-word reply ≈ 260 tokens). The table recalculates instantly and shows the projected monthly spend for every model. You can sort by cost to find the cheapest option for your workload.
Which LLM models does voiddo llm-cost include?
voiddo llm-cost covers 23 models including GPT-4o, GPT-4o mini, GPT-4 Turbo, Claude Opus 4, Claude Sonnet 4, Claude Haiku, Gemini 1.5 Pro, Gemini 1.5 Flash, Gemini Flash-Lite, DeepSeek V3, DeepSeek R1, Grok 2, Mistral Large, Mistral Nemo, Llama 3.1 405B (via Groq), Llama 3.1 70B (via Groq), Cohere Command R+, and several others. Prices are updated manually when providers announce changes.
Can I export the LLM cost comparison as a spreadsheet?
Yes. The Export CSV button is available with voiddo Pro ($9 one-time). The CSV includes model name, provider, input cost per 1K tokens, output cost per 1K tokens, and projected monthly spend at your specified usage. After purchase the export is always available when you revisit the tool.
How often are the LLM API prices in voiddo llm-cost updated?
Prices are updated manually whenever a major provider announces a change. OpenAI, Anthropic, and Google have each cut API prices multiple times in 2024–2025. For the most current rates on newly released models, cross-check with the provider's official pricing page. If you spot a stale price in voiddo llm-cost, email support@voiddo.com.